protect his family. He is later revealed to be one of the non-terrestrials that survived the 1944 crash. He is shot and killed by a number of Sophia's people while trying to help Leila and Simon escape. Lisa Vidal as Christina Martinez – the First Lady of the United States. In the final episode, it is revealed that the First Lady is one of the "Sleepers" as she calls the planet entering Earth's orbit "Home". Bill Smitrovich as Raymond Jarvis – the opposition party Vice President of the United States who is revealed to be involved in the conspiracy. He was later named acting president while Martinez was incapacitated in hospital. Clifton Collins, Jr. as Thomas – a member of the non-terrestrials who escaped capture, but now is in contact with the other "Sleepers" who are not imprisoned. He is Sophia's son, and is much more militant than she. He is killed by a Hellfire missile launched from an Apache helicopter in a strike ordered by President Martinez. Željko Ivanek as Blake Sterling – the Director of National Intelligence, who has long kept secrets from the President. He was fired by Jarvis when he questioned Jarvis's involvement in Martinez's poisoning, but later reinstated after Martinez recovered. Taylor Cole as Vicky Roberts – a woman who Sean and Leila meet while on a cruise. She is later revealed to be an assassin who formerly worked for the CIA. Vicky kidnaps Leila in an attempt to draw Sean out. She fosters a child she orphaned after participating in a mission where she assassinated the child's family. Recurring cast Heather McComb as Agent Angela Collier – an FBI agent that was involved in the arrest of Sean Walker. Initially, Walker's claims of the series of events that lead to Leila's disappearance seem delusional to Collier, but after witnessing her coworkers and friends get killed by the people who are after Sean, she becomes entangled with Walker as the truth unravels. D. B. Sweeney as Carter – an assassin who worked alongside Vicky to hold Leila. Hal Holbrook as James Dempsey – an elderly and powerful businessman who is the head of the vast conspiracy to cover up the existence of the aliens. He gives orders to Vicky and Carter and has a private army of innumerable assassins to carry out his orders. He is revealed to have the ability to shift to a